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Technical training. Product information. BMW Service G01 Voltage Supply and Bus Systems

Technicaltraining. Productinformation. G01Voltage

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Page 1: Technicaltraining. Productinformation. G01Voltage

Technical�training.Product�information.

BMW�Service

G01�Voltage�Supply�and�Bus�Systems

qxe9957
ST1701_9-1-17
Page 2: Technicaltraining. Productinformation. G01Voltage

General�information

Symbols�used

The�following�symbol�is�used�in�this�document�to�facilitate�better�comprehension�or�to�draw�attentionto�very�important�information:

Contains�important�safety�information�and�information�that�needs�to�be�observed�strictly�in�order�toguarantee�the�smooth�operation�of�the�system.

Information�status�and�national-market�versions

BMW�Group�vehicles�meet�the�requirements�of�the�highest�safety�and�quality�standards.�Changesin�requirements�for�environmental�protection,�customer�benefits�and�design�render�necessarycontinuous�development�of�systems�and�components.�Consequently,�there�may�be�discrepanciesbetween�the�contents�of�this�document�and�the�vehicles�available�in�the�training�course.

This�document�basically�relates�to�the�European�version�of�left�hand�drive�vehicles.�Some�operatingelements�or�components�are�arranged�differently�in�right-hand�drive�vehicles�than�shown�in�thegraphics�in�this�document.�Further�differences�may�arise�as�the�result�of�the�equipment�specification�inspecific�markets�or�countries.

Additional�sources�of�information

Further�information�on�the�individual�topics�can�be�found�in�the�following:

• Owner's�Handbook• Integrated�Service�Technical�Application.

Contact:�[email protected]

©2017�BMW�AG,�Munich

Reprints�of�this�publication�or�its�parts�require�the�written�approval�of�BMW�AG,�Munich.

The�information�contained�in�this�document�forms�an�integral�part�of�the�BMW�Group�TechnicalQualification�and�is�intended�for�the�trainer�and�participants�in�the�seminar.�Refer�to�the�latest�relevantinformation�systems�of�the�BMW�Group�for�any�changes/additions�to�the�technical�data.

Information�status:�June�2017Technical�training.

Page 3: Technicaltraining. Productinformation. G01Voltage

G01�Voltage�Supply�and�Bus�SystemsContents1. Introduction.............................................................................................................................................................................................................................................1

2. Bus�Systems..........................................................................................................................................................................................................................................22.1. Bus�overview.................................................................................................................................................................................................................22.2. Main�bus�systems.................................................................................................................................................................................................4

2.2.1. K-CAN....................................................................................................................................................................................................42.2.2. PT-CAN................................................................................................................................................................................................42.2.3. MOST......................................................................................................................................................................................................42.2.4. FlexRay..................................................................................................................................................................................................52.2.5. Ethernet...............................................................................................................................................................................................62.2.6. D-CAN................................................................................................................................................................................................15

2.3. Sub-bus�systems...............................................................................................................................................................................................152.3.1. LIN-Bus............................................................................................................................................................................................152.3.2. Local�CAN....................................................................................................................................................................................252.3.3. USB........................................................................................................................................................................................................26

2.4. Diagnosis�access�OBD2........................................................................................................................................................................26

3. Control�Units....................................................................................................................................................................................................................................273.1. Installation�locations�of�control�units.................................................................................................................................273.2. Gateway............................................................................................................................................................................................................................29

3.2.1. Body�Domain�Controller�(BDC).................................................................................................................29

4. Voltage�Supply.............................................................................................................................................................................................................................324.1. Overview�of�voltage�supply...............................................................................................................................................................32

4.1.1. System�wiring�diagram............................................................................................................................................324.2. Components..............................................................................................................................................................................................................34

4.2.1. Overview�of�luggage�compartment.....................................................................................................344.2.2. Overview�of�engine�compartment.........................................................................................................354.2.3. Battery...............................................................................................................................................................................................354.2.4. Intelligent�battery�sensor.....................................................................................................................................364.2.5. Safety�battery�terminal............................................................................................................................................364.2.6. Alternator.......................................................................................................................................................................................364.2.7. Integrated�supply�module...................................................................................................................................374.2.8. Power�distribution�box,�front�right.........................................................................................................374.2.9. Power�distribution�box,�rear............................................................................................................................384.2.10. Body�Domain�Controller.......................................................................................................................................384.2.11. PCU�with�vehicle�electrical�system�assistance�measure...................................38

5. Terminal�Control........................................................................................................................................................................................................................405.1. Introduction.................................................................................................................................................................................................................405.2. Vehicle�conditions............................................................................................................................................................................................40

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G01�Voltage�Supply�and�Bus�SystemsContents

5.3. Power�supply�terminals...........................................................................................................................................................................445.4. Partial�network�operation......................................................................................................................................................................45

5.4.1. Partial�network�operation�when�driving.........................................................................................465.4.2. Prerequisites�for�partial�network�operation.............................................................................465.4.3. Prerequisites�of�control�units�for�partial�network�operation...........................465.4.4. Partial�network�operation�when�the�vehicle�is�stationary�and�the

engine�is�switched�off..............................................................................................................................................46

Page 5: Technicaltraining. Productinformation. G01Voltage

G01�Voltage�Supply�and�Bus�Systems1.�Introduction

1

In�terms�of�technology,�the�new�BMW�X3�is�based�on�the�G12�and�G30.

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

2

2.1.�Bus�overview

Bus�overview

Page 7: Technicaltraining. Productinformation. G01Voltage

G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

3

Index ExplanationACC Active�Cruse�ControlACSM Advanced�Crash�Safety�ModuleAHM Trailer�moduleAMPT Top�HiFi�amplifierASD Active�Sound�DesignBDC Body�Domain�ControllerCON ControllerDME Digital�Motor�ElectronicsDSC Dynamic�Stability�ControlEGS Electronic�transmission�controlENS Ethernet�switchEPS Electromechanical�Power�SteeringFBD Remote�control�receiverFLA High-beam�assistantFLER Frontal�Light�Electronics�RightFLEL Frontal�Light�Electronics�LeftFZD Roof�function�centerGWS Gear�selectorHEADUNIT Head�unitHKFM Tailgate�function�moduleIHKA Integrated�automatic�heating�/�air�conditioningKAFAS Camera-based�driver�support�systemsKOMBI Instrument�panelPCU Power�Control�UnitPMA Parking�Manoeuvring�AssistantRFK Rear�view�cameraRSL Radar�Sensor,�Left�(avoidance�assistant)RSR Radar�Sensor,�Right�(avoidance�assistant)SAS Optional�equipment�systemSMBF Seat�module,�passengerSMFA Seat�module,�driverSWW Lane�change�warning�(primary)SWW2 Lane�change�warning�(secondary)TCB Telematic�Communication�BoxTRSVC Top�Rear�Side�View�Camera

Page 8: Technicaltraining. Productinformation. G01Voltage

G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

4

Index ExplanationVDP Vertical�Dynamic�PlatformVTG Transfer�boxWCA Wireless�charging�trayZGM Central�gateway�module1 Start-up�node�control�units�for�starting�and�synchronizing

the�FlexRay�bus�system2 Control�units�with�wake-up�authorization3 Control�units�also�connected�at�terminal�15WUP

2.2.�Main�bus�systems

2.2.1.�K-CANIn�the�G01�the�following�K-CAN’s�are�used:

• K-CAN2• K-CAN3• K-CAN4• K-CAN5

The�control�units�on�the�K-CAN5�are�not�displayed�in�the�bus�overview�by�the�BMW�diagnosis�systemISTA.�Diagnosis�is�performed�via�the�Body�Domain�Controller.

All�K-CAN�data�buses�have�a�data�transfer�rate�of�500 kBit/s.

2.2.2.�PT-CANIn�the�G01�the�following�PT-CAN�are�used:

• PT-CAN• PT-CAN2

The�gateway�for�the�PT-CAN2�is�located�in�the�DME.

Both�PT-CAN�data�buses�have�a�data�transfer�rate�of�500 kBit/s.

2.2.3.�MOSTOn�the�G01�the�MOST�system�known�from�other�BMW�models�with�a�data�transfer�rate�of�22.5 MBit/sis�used.�The�gateway�for�the�MOST�system�is�located�in�the�HEAD�UNIT.

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

5

2.2.4.�FlexRay

FlexRay

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6

Index Explanation1 Dynamic�Stability�Control�(DSC)2 Digital�Motor�Electronics�(DME)3 Transfer�box4 Electronic�Power�Steering�(electromechanical�power�steering)�(EPS)5 Body�Domain�Controller�(BDC)6 Vertical�Dynamics�Platform�(VDP)7 Advanced�Crash�Safety�Module�(ACSM)8 Optional�equipment�system�(SAS)

The�FlexRay�overview�includes�all�engine�versions�and�optional�equipment.�The�terminating�resistorsfor�line�termination�are�located�in�the�control�units�and�in�the�Body�Domain�Controller.

The�FlexRay�has�a�data�transfer�rate�of�10 MBit/s.

2.2.5.�EthernetThe�G01�features�the�two-wire�OABR�Ethernet�(OPEN�Alliance�BroadR-Reach)�which�is�familiar�fromthe�G12.

The�Ethernet�variant�with�5�lines�(4�data�lines�and�1�activation�line)�is�still�used�on�the�G01�by�theOBD2�interface�to�the�Body�Domain�Controller.

Use�of�the�two-wire�OABR�Ethernet�on�the�G01

The�following�control�units�are�connected�to�the�vehicle�electrical�system�via�two-wire�OABR�Ethernetin�the�G01:

• Active�Cruise�Control�(ACC)• Camera-based�driver�support�systems�(KAFAS)• Top�Rear�Side�View�Camera�(TRSVC)• Rear�view�camera�(RFK).

The�following�control�units�are�additionally�connected�via�two-wire�OABR�Ethernet�in�the�G01:

• Head�unit• Optional�equipment�system�(SAS)• Telematic�Communication�Box

Ethernet�in�the�vehicle

The�standard�"Open�Alliance�BroadR-Reach"�(OABR�Ethernet)�has�been�specially�developed�as�anew�data�transmission�layer�for�use�in�vehicles.�OABR�Ethernet�only�requires�an�unshielded�twistedtwo-wire�connection.�OABR�Ethernet�supports�bidirectional�100 MBit/s�communication�between�2nodes.�This�means�that�both�nodes�can�simultaneously�send�and�receive�at�a�data�transfer�rate�of

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7

100 MBit/s.�OABR�Ethernet�requires�point-to-point�networking.�This�means�that�the�bus�system�isnot�split�up�between�multiple�nodes,�as�is�the�case�e.g.�with�CAN�(Controller�Area�Network)�systems.Instead,�Ethernet�switches�are�used�for�the�connection�of�further�nodes.�Today,�Ethernet�switches�areintegrated�in�the�following�control�units:

• Body�Domain�Controller�(BDC)• Optional�equipment�system�(SAS)• Top�Rear�Side�View�Camera�(TRSVC).

An�Ethernet�switch�(ENS)�is�used�on�the�G01�depending�on�the�vehicle�equipment.�In�the�event�offailure�of�an�Ethernet�switch,�all�bus�users�connected�by�it�are�disconnected�from�the�rest�of�thenetwork�and�are�no�longer�able�to�communicate�via�Ethernet.

Depending�on�the�vehicle�equipment,�the�control�units�are�connected�to�the�vehicle�electricalsystem�in�different�ways.

On�vehicles�without�navigation,�the�data�transfer�takes�place�from�the�Headunit�Basic�to�theinstrument�cluster�via�Ethernet.

On�vehicles�with�Navigation,�the�data�is�transferred�from�the�Headunit�HIGH�to�the�instrument�clustervia�an�APIX�data�cable.

Depending�on�the�vehicle�equipment�an�Ethernet�switch�may�in�some�cases�be�required.

A�wake-up�line�may�be�required�for�control�units�that�are�only�connected�to�the�Ethernet�andare�not�additionally�connected�to�a�body�CAN.

Control�units�on�the�Ethernet�cannot�be�woken�up�via�the�bus.�Instead,�the�control�units�are�activatedvia�the�wake-up�line�or�switched�directly�via�terminal�15.�As�a�result�of�the�activation�via�a�wake-up�line,so-called�partial�network�operation�is�also�possible.�In�partial�network�operation,�individual�control�unitscan�switch�to�a�rest�state�in�different�vehicle�conditions.

The�different�versions�of�the�Ethernet�topology�of�the�G01�are�listed�below:

Ethernet�topology�without�Ethernet�switch�on�vehicles�with�Headunit�Basic

The�wiring�diagram�shows�the�connection�of�the�top�rear�side�view�camera�(TRSVC)�control�unit�andrear�view�camera�(RFK).�In�the�vehicle,�either�TRSVC�is�installed�for�a�vehicle�with�multiple�cameras,�orRFK�for�a�vehicle�with�a�rear�view�camera�(standalone).

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

8

Ethernet�topology�without�Ethernet�switch

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

9

Index Explanation1 Top�Rear�Side�View�Camera�(TRSVC)2 Instrument�cluster�(KOMBI)3 Camera-based�driver�support�systems�(KAFAS)4 Body�Domain�Controller�(BDC)5 OBD2�interface�(Ethernet�with�5�lines)6 Headunit�(HEADUNIT)7 Telematic�Communication�Box�(TCB)8 Rear�view�camera�(RFK)

On�vehicles�without�navigation,�the�data�transfer�takes�place�from�the�Headunit�Basic�to�theinstrument�cluster�via�Ethernet.

Ethernet�topology�with�Ethernet�switch�on�vehicles�with�Headunit�Basic

The�wiring�diagram�shows�the�connection�of�the�top�rear�side�view�camera�(TRSVC)�control�unit�andrear�view�camera�(RFK).�In�the�vehicle,�either�TRSVC�is�installed�for�a�vehicle�with�multiple�cameras,�orRFK�for�a�vehicle�with�a�rear�view�camera�(standalone).

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10

Ethernet�topology�with�Ethernet�switch

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11

Index Explanation1 Top�Rear�Side�View�Camera�(TRSVC)2 Ethernet�switch�(ENS)3 Optional�equipment�system�(SAS)4 Active�Cruise�Control�(ACC)5 Body�Domain�Controller�(BDC)6 Camera-based�driver�support�systems�(KAFAS)7 Instrument�cluster�(KOMBI)8 OBD2�interface�(Ethernet�with�5�lines)9 Headunit�(HEADUNIT)10 Telematic�Communication�Box�(TCB)11 Rear�view�camera�(RFK)

On�vehicles�without�navigation,�the�data�transfer�takes�place�from�the�Headunit�Basic�to�theinstrument�cluster�via�Ethernet.

Ethernet�topology�on�vehicles�with�Headunit�High

The�wiring�diagram�shows�the�connection�of�the�top�rear�side�view�camera�(TRSVC)�control�unit�andrear�view�camera�(RFK).�In�the�vehicle,�either�TRSVC�is�installed�for�a�vehicle�with�multiple�cameras,�orRFK�for�a�vehicle�with�a�rear�view�camera�(standalone).

On�vehicles�with�the�Headunit�High,�the�Telematic�Communication�Box�(TCB)�is�directly�connected�tothe�headunit.�The�data�is�transferred�from�the�Headunit�High�to�the�instrument�cluster�via�APIX.�Theinstrument�cluster�does�not�require�Ethernet.�As�a�result,�the�Ethernet�interfaces�on�the�Body�DomainController�are�sufficient,�and�no�Ethernet�switch�(ENS)�is�required.

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

12

Ethernet�topology�on�vehicles�with�Headunit�High

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

13

Index Explanation1 Top�Rear�Side�View�Camera�(TRSVC)2 Optional�equipment�system�(SAS)3 Active�Cruise�Control�(ACC)4 Body�Domain�Controller�(BDC)5 Camera-based�driver�support�systems�(KAFAS)6 OBD2�interface�(Ethernet�with�5�lines)7 Instrument�cluster�(KOMBI)8 APIX�data�line9 Headunit�(HEADUNIT)10 Telematic�Communication�Box�(TCB)11 Rear�view�camera�(RFK)

On�vehicles�with�Navigation,�the�data�is�transferred�from�the�Headunit�High�to�the�instrument�clustervia�APIX.

Ethernet�switch

Ethernet�switch

The�Ethernet�switch�is�required�for�expansion�of�the�Ethernet�network.�It�connects�the�control�unitsand�forwards�their�data�packages�accordingly.

The�Ethernet�switch�is�displayed�as�a�control�unit�in�the�bus�overview�by�the�diagnosis�system�ISTA.

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

14

Connections�on�the�Ethernet�switch

Ethernet�switch�connections

Index Explanation1 Labelling�of�ports2 Port�03 Port�14 Port�25 Port�36 Port�4

The�Ethernet�switch�has�a�maximum�of�5�ports.�The�Ethernet�cable�to�the�Body�Domain�Controller(BDC)�is�connected�to�port�0.�In�addition,�voltage�for�the�Ethernet�switch�is�supplied�to�port�0.�Theother�Ethernet�control�units�are�connected�to�ports�1�to�4.�The�connectors�for�ports�1�to�4�areidentical,�so�the�other�Ethernet�control�units�can�be�connected�as�required.�It�does�not�matter�whichcontrol�unit�is�connected�to�which�port�as�this�does�not�affect�the�function.�However,�for�diagnosis�andtroubleshooting,�it�is�important�to�know�which�control�unit�is�assigned�to�which�port.�If�the�Ethernetswitch�is�exchanged�or�the�Ethernet�cables�in�ports�1�to�4�have�been�connected�in�a�different�order,�aport�configuration�must�be�carried�out�with�the�diagnosis�system�ISTA.

Without�a�port�configuration,�Ethernet�errors�cannot�be�detected�and�errors�can�therefore�not�bestored.

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15

2.2.6.�D-CANThe�D-CAN�has�a�data�transfer�rate�of�500�kBit/s.

2.3.�Sub-bus�systems

2.3.1.�LIN-BusFor�a�better�overview,�the�LIN�buses�are�divided�up�between�several�wiring�diagrams�for�the�G01.

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16

LIN�bus�overview�in�the�door�area

LIN-Bus

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

17

Index Explanation1 Body�Domain�Controller�(BDC)2 Exterior�mirror,�front�passenger�side3 Memory�seat,�front�passenger's�side4 Power�window�electronics,�passenger's�side�front5 Power�window�electronics,�passenger’s�side�rear6 Non-contact�tailgate�opening7 Power�window�electronics,�driver’s�side�rear8 Power�window�electronics,�driver's�side�front9 Memory�switch,�driver’s�side�front10 Switch�block,�driver's�door11 Exterior�mirror,�driver's�side

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

18

LIN�bus�overview�for�engine�electrical�system�and�voltage�supply

LIN-Bus

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

19

Index Explanation1 Active�kidney�grills2 Electric�fan3 Body�Domain�Controller�(BDC)4 Rear�right�power�distribution�box5 Intelligent�Battery�Sensor�(IBS)6 Alternator7 Digital�Motor�Electronics�(DME)

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20

LIN�bus�overview�for�roof�function�center

LIN-Bus

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

21

Index Explanation1 Rain‐light‐solar-condensation�sensor�(RLSBS)2 Inside�mirror3 Roof�function�center�(FZD)4 Body�Domain�Controller�(BDC)5 Interior�lighting,�rear6 Siren�with�tilt�alarm�sensor�(SINE)

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

22

LIN�bus�overview�for�steering�column�switch�cluster�and�operating�units

LIN-Bus

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

23

Index Explanation1 Body�Domain�Controller�(BDC)2 Operating�unit,�center�console3 Audio�operating�facility4 HOD�touch�detection�(Hands�Off�Detection)5 Steering�wheel�module6 Multifunction�steering�wheel�buttons,�right7 Operating�unit�for�light8 Steering�column�switch�cluster�(SZL)

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24

LIN�bus�overview�for�integrated�automatic�heating/air�conditioning�system

LIN-Bus

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G01�Voltage�Supply�and�Bus�Systems2.�Bus�Systems

25

Index Explanation1 Blower�motor2 Operating�unit,�rear�passenger�compartment3 Stepper�motor�for�air�distribution,�rear�passenger�compartment4 Stepper�motor�for�air�distribution,�left5 Stepper�motor�for�stratification,�left6 Stepper�motor�for�mixed�air,�left7 Stepper�motor�for�temperature,�rear�passenger�compartment8 Stepper�motor�for�mixed�air,�right9 Stepper�motor�for�stratification,�right10 Stepper�motor�for�air�distribution,�right11 Stepper�motor�for�defrost�function12 Stepper�motor�for�fresh�air/air�recirculation�function13 Operating�unit,�air�conditioning14 Integrated�automatic�heating�/�air�conditioning�(IHKA)

2.3.2.�Local�CANIn�the�G01�the�following�Local�Controller�Area�Networks�are�available�with�the�correspondingequipment:

• Local�CAN�from�the�camera-based�driver�assistance�system�(KAFAS)�to�the�ParkingManoeuvring�Assistant�(PMA)

• Local�CAN�from�the�optional�equipment�system�(SAS)�to�the�radar�sensor,�front�right�(RSR)• Local�CAN�from�the�optional�equipment�system�(SAS)�to�the�radar�sensor,�front�left�(RSL)�and

lane�change�warning�(secondary)�(SWW2)• Local�CAN�from�the�lane�change�warning�(primary)�(SWW)�to�the�radar�sensor,�right�(RSR),�to

the�radar�sensor,�left�(RSL),�and�to�the�lane�change�warning�(secondary)�SWW2.

The�control�units�on�the�local�CAN�are�not�displayed�in�the�bus�overview�by�the�BMW�diagnosissystem�ISTA.�Diagnosis�takes�place�via�the�corresponding�primary�control�unit.

The�local�CAN�buses�have�a�data�transfer�rate�of�500 kBit/s.

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2.3.3.�USBThe�following�USB�interfaces�are�provided�in�the�G01�depending�on�the�vehicle�equipment:

• USB�interface�in�the�center�console�(standard)• USB�interface�in�the�center�armrest

2.4.�Diagnosis�access�OBD2The�vehicle�diagnosis�via�D-CAN�is�effected�using�the�OBD2�interface.�The�Ethernet�access�for�thevehicle�programming�is�also�located�in�the�OBD2�interface.

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G01�Voltage�Supply�and�Bus�Systems3.�Control�Units

27

3.1.�Installation�locations�of�control�units

Installation�locations�of�control�units

Index Explanation1 Rear�view�camera�(RFK)2 Lane�change�warning�(secondary)�(SWW2)3 Telematic�Communication�Box�(TCB)4 Top�HiFi�amplifier�(AMPT)5 Control�unit�for�rear�view�camera�and�side�view�(TRSVC)6 Remote�control�receiver�(remote�control�service)7 Active�Sound�Design�(ASD)8 Wireless�Charging�Station�(WCA)�(Location�moved�in�front�of�cup�holders�in

center�console,�not�under�center�arm�rest)9 Roof�function�center�(FZD)

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Index Explanation10 Camera-based�driver�support�systems�(KAFAS)11 High-beam�assistant�(FLA)12 Instrument�cluster�(KOMBI)13 Ethernet�switch�(ENS)14 Optional�equipment�system�(SAS)15 Digital�Motor�Electronics�(DME)16 Dynamic�Stability�Control�(DSC)17 Frontal�Light�Electronics�Right�(FLER)18 Radar�Sensor�Left�(RSL)19 Active�Cruise�Control�(ACC)20 Frontal�Light�Electronics�Right�(FLER)21 Radar�Sensor�Right�(RSR)22 Electronic�Power�Steering�(EPS)23 Electronic�transmission�control�(EGS)24 Transfer�box�(VTG)25 Headunit26 Driver's�seat�module�(SMFA)27 Gear�selector�switch�(GWS)28 Integrated�automatic�heating�/�air�conditioning�(IHKA)29 Body�Domain�Controller�(BDC)30 Controller�(CON)31 Front�passenger�seat�module,�(SMBF)32 Advanced�Crash�Safety�Module�(ACSM)33 Trailer�module�(AHM)34 Power�Control�Unit�(PCU)35 Lane�change�warning�(SWW)�(primary)36 Tailgate�function�module�(HKFM)37 Vertical�Dynamic�Platform�(VDP)38 Parking�Manoeuvring�Assistant�(PMA)

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3.2.�Gateway

3.2.1.�Body�Domain�Controller�(BDC)

Body�Domain�Controller�(BDC)

BDC�functions

The�Body�Domain�Controller�(BDC)�is�responsible�for�the�following�functions:

• Gateway• Electronic�immobilizer• Terminal�control• Central�locking�system• Exterior�lights• Power�windows• Horn• Interior�light• Wash/wipe�system• Vehicle�data�storage• Data�transfer�for�Condition�Based�Service�(CBS).

Fuses�in�the�BDC

The�following�components�are�protected�by�fuses�in�the�BDC:

• Audio�operating�facility• Operating�facility�for�assist�systems• Operating�unit�for�light• Power�windows

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• Heated�rear�window• Tailgate�function�module• Integrated�automatic�heating�/�air�conditioning• OBD2�interface• Power�Control�Unit• Rain‐light‐solar-condensation�sensor• Steering�column�switch�cluster• Telematic�Communication�Box• Outside�door�handle�electronics• Vertical�dynamics�platform�(electronics)• Central�locking�system• Wiper�motor.

Relay�in�the�BDC

The�following�relays�are�located�in�the�BDC:

• Terminal�30F• Power�window�regulator• Central�locking�system• Heated�rear�window• Wiper�motor• Headlight�cleaning�system.

Gateway�in�the�BDC

The�central�gateway�module�(ZGM)�is�integrated�in�the�BDC.�It�is�viewed�as�a�control�unit�within�acontrol�unit,�in�that�the�ZGM�in�the�BDC.�The�task�of�the�ZGM�is�to�connect�all�the�data�bus�systemsto�each�other.�By�connecting�them�in�this�way,�it�is�possible�to�use�information�from�the�individual�bussystems�on�a�generalized�level.�The�central�gateway�module�is�able�to�implement�different�protocolsand�speeds�on�other�bus�systems.�The�programming�data�for�the�control�units�is�transmitted�byEthernet�to�the�vehicle�via�the�ZGM.

LIN�controller�in�the�BDC

The�BDC�is�the�gateway�for�the�following�components�at�the�local�interconnect�network�bus:

• Exterior�mirror,�left�and�right• Switch�block,�driver's�door,�front�passenger�door• Steering�column�switch�cluster• Light�switch• Intelligent�Safety�button

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• Audio�operating�facility• Inside�mirror• Rain‐light‐solar-condensation�sensor• Roof�function�center�(interior�lighting)• Comfort�seat,�rear�passenger�compartment,�left�and�right• Operating�unit,�center�console• Power�distribution�box,�rear.

The�following�control�units�are�connected�to�the�BDC�via�LIN,�but�the�BDC�has�only�a�wake-upfunction�and�not�a�gateway�or�primary�function:

• Battery�charging�unit• Intelligent�battery�sensor• Electric�fan• Active�air�flap�control• Digital�Motor�Electronics.

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4.1.�Overview�of�voltage�supply

4.1.1.�System�wiring�diagram

Voltage�supply

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Index Explanation1 Digital�Motor�Electronics�(DME)2 Starter�motor3 Alternator4 Power�distribution�box,�engine�compartment5 Jump�start�terminal�point6 Auxiliary�battery,�engine�compartment7 Power�distribution�box,�front�right8 Body�Domain�Controller�(BDC)9 Fuse�in�the�Body�Domain�Controller10 CAN�terminator11 Power�distribution�box,�rear12 Power�Control�Unit�(PCU)�500�W13 Battery�power�distribution�box14 Safety�battery�terminal15 Battery

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4.2.�Components

4.2.1.�Overview�of�luggage�compartment

Battery

Index Explanation1 Power�distribution�box,�rear2 Power�Control�Unit�(PCU)�500�W3 Power�distribution�box�with�safety�battery�terminal4 Battery

The�vehicle�battery�in�the�G01�is�an�AGM�battery�with�90�Ah.

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4.2.2.�Overview�of�engine�compartment

Auxiliary�battery,�engine�compartment

Index Explanation1 Power�distribution�box,�engine�compartment2 Auxiliary�battery,�engine�compartment3 Jump�start�terminal�point

The�auxiliary�battery�in�the�engine�compartment�of�the�G01�is�an�AGM�battery�with�50�Ah.

4.2.3.�BatteryAGM�batteries�are�used�for�the�voltage�supply�in�the�G01.

There�may�be�1�or�2�batteries�in�the�vehicle�depending�on�the�engine�version�and�vehicle�equipment.

• Starter�battery�in�the�luggage�compartment�with�90�Ah• Auxiliary�battery�in�the�engine�compartment�with�50�Ah.

An�auxiliary�battery�in�the�engine�compartment�is�used�to�provide�assistance�for�the�vehicle�electricalsystem.

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4.2.4.�Intelligent�battery�sensorThe�IBS�records�the�following�data�of�the�12 V�battery:

• Voltage• Current• Pole�temperature

The�IBS�performs�the�calculation�and�the�evaluation�of�the�information.�The�results�are�then�forwardedto�the�DME�and�BDC�via�LIN�bus�.

4.2.5.�Safety�battery�terminal

Safety�battery�terminal

The�safety�battery�terminal�(SBK)�is�activated�in�the�event�of�an�accident�of�corresponding�severity.The�voltage�supply�to�the�positive�battery�connection�point�in�the�engine�compartment�is�interruptedand�the�consumers�connected�to�this�are�de-energized.�The�safety�battery�terminal�is�installed�in�thepower�distribution�box�next�to�the�battery.

4.2.6.�AlternatorAn�alternator�with�increased�efficiency�is�used�in�the�G01.�The�increase�in�alternator�efficiency�isachieved�by�reducing�the�losses�in�the�rectifier.�The�loss-causing�diodes�are�replaced�by�activelyactivated�MOSFET�transistors.�A�reduction�in�fuel�consumption�is�achieved�by�increasing�theefficiency.

Different�alternators�are�used�depending�on�the�engine�type�and�vehicle�equipment.

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4.2.7.�Integrated�supply�module

Integrated�supply�module

The�engine�control�and�its�components�are�supplied�with�a�12 V�voltage�via�the�integrated�supplymodule.

4.2.8.�Power�distribution�box,�front�right

Power�distribution�box,�front�right

A�relay�for�terminal�30B�is�installed�in�the�front�right�power�distribution�box.

Consumers�are�supplied�with�terminal�30�and�terminal�30B�and�provided�with�corresponding�fuseprotection�by�the�front�right�power�distribution�box.

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4.2.9.�Power�distribution�box,�rear

Power�distribution�box,�rear

The�following�relays�are�installed�in�the�rear�power�distribution�box:

• 2�Relay,�terminal�30F• 2�Relay,�terminal�30B• Relay,�terminal�15N• Relay�for�rear�window�heating.

All�relays�are�bi-stable�relays.�The�relays�are�activated�by�the�Body�Domain�Controller�via�LIN.�Theterminal�30B�relay�in�the�front�right�power�distribution�box�is�activated�by�the�rear�power�distributionbox.

4.2.10.�Body�Domain�ControllerThe�Body�Domain�Controller�(BDC)�is�responsible�for�the�terminal�control.

A�terminal�30F�relay�is�installed�in�the�BDC.

A�number�of�consumers�are�supplied�with�terminal�30�and�terminal�30F�and�provided�withcorresponding�fuse�protection�via�the�BDC.

4.2.11.�PCU�with�vehicle�electrical�system�assistance�measureBMW�vehicles�have�a�high�energy�consumption�due�to�the�many�electrical�consumers.�As�a�result,there�is�a�high�demand�on�the�battery,�particularly�in�phases�in�which�the�combustion�engine�is�notrunning�and�the�alternator�supplies�no�energy�(e.g.�engine�start-stop�phases).

In�order�to�protect�the�vehicle�battery,�a�DC/DC�converter�is�installed�in�the�Power�Control�Unit�(PCU)and�an�auxiliary�battery�in�the�engine�compartment�in�the�G01.

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The�preconditions�for�the�direction�of�the�energy�management�are�calculated�from�the�use�of�thevehicle.�When�the�engine�is�running�the�auxiliary�battery�is�charged�from�the�conventional�vehicleelectrical�system.�During�the�phases�in�which�the�combustion�engine�is�not�running,�e.g.�automaticengine�start-stop�function,�the�energy�is�supplied�from�the�auxiliary�battery�into�the�conventionalvehicle�electrical�system.

The�Power�Control�Unit�(PCU)�contains�a�control�unit�which�is�connected�to�the�PT-CAN2�and�theDC/DC�converter�with�a�power�of�500 W.

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5.1.�IntroductionThe�terminal�control�in�the�G01�is�identical�to�the�terminal�control�of�the�G12.�In�the�G01,�the�vehicleis�always�in�the�right�condition�from�the�point�of�view�of�the�customer.�The�terminals�are�controlledvia�a�customer-oriented�condition�management.�The�terminal�control�is�dependent�on�the�drivingconditions.

5.2.�Vehicle�conditionsThe�G01�vehicle�may�be�in�the�following�conditions:

• Parking• Residing• Driving

The�different�vehicle�functions�are�possible�depending�on�the�relevant�conditions.

Parking

• Customer�not�in�the�vehicle• Vehicle�secured�or�not�used�for�a�certain�time• Vehicle�functions�cannot�be�operated.

Residing

• Customer�in�the�vehicle• No�driving�readiness• Functions�that�are�relevant�when�the�vehicle�is�stationary�can�be�operated.

Driving

• Customer�in�the�vehicle• Driving�readiness�established• All�functions�are�available.

The�driving�conditions�are�changed�by�condition�management,�taking�into�account�the�customerbehavior.�Additional�information�is�also�evaluated�that�may�help�to�determine�the�vehicle�condition,e.g.:

• Door�opening• Door�closing• Operations�in�the�vehicle.

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The�following�diagram�shows�the�changes�between�the�vehicle�conditions.

Vehicle�conditions

Index ExplanationA Vehicle�condition�PARKINGB Transitional�condition�with�stationary�functionsC Vehicle�condition�RESIDINGD Transitional�condition�for�establishing�driving�readiness,�ending�driving

readiness�or�Testing/Analysis/DiagnosisE Vehicle�condition�DRIVING1 Unlock�vehicle2 Operation�of�start/stop�button�+�brake�pedal3 Press�START-STOP�button4 Locks�vehicle5 No�activity�of�a�vehicle�user�detected�for�10 min6 Extended�press

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Detailed�overview�of�vehicle�conditions.

Overview�of�vehicle�conditions

Index ExplanationA Vehicle�condition�DRIVINGB Vehicle�condition�RESIDINGC Vehicle�condition�PARKINGa Transitional�condition�for�ESTABLISHING/ENDING�DRIVING�READINESS,

CHECK/ANALYSIS/DIAGNOSISb Transitional�condition�with�STATIONARY�FUNCTIONS

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Index Explanation1 Operation�of�start/stop�button�+�brake�pedal�+�valid�remote�control�or�valid�ID

transmitter�in�the�vehicle�interior2 Driving�readiness�established,�terminal�15N�(terminal�50)3 Operation�of�start/stop�button�(three�times�within�0,8�s)�+�valid�remote�control

or�valid�ID�transmitter�in�the�vehicle�interior4 Terminal�15N5 Operation�of�start/stop�button�+�selector�lever�in�Neutral6 Undoing�driver's�seat�belt�(v�<�0.1�km/h,�driver's�door�opened,�selector�lever

not�in�Neutral,�brake�not�pressed,�low�beam�off,�no�OBD�communication,�nodiagnosis�mode,�no�assembly�mode)

7 Door�contact�change�(v�<�0.1�km/h,�driver's�seat�belt�undone,�selector�levernot�in�Neutral,�brake�not�pressed,�low�beam�off,�no�OBD�communication,�nodiagnosis�mode,�no�assembly�mode)

8 Press�start/stop�button�+�vehicle�is�stationary�or�press�start/stop�button�for�atleast�1 s�+�driving�speed�≥�10�km/h�(6�mph)�or�press�start/stop�button�at�leastthree�times�within�4 s�+�driving�speed�≥�10�km/h�(6�mph)

9 Press�START-STOP�button10 Terminal�30B11 Unlock�vehicle12 Residing�interaction�or�stationary�function�interaction13 Locks�vehicle14 No�customer�interaction�for�ten�minutes15 Extended�press�of�headunit�media�button16 Terminal�30F

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Automatic�switch-off

Automatic�switch-off

Switch�off�after�door�opening:

In�the�menu�"Doors/Keys",�an�immediate�change�from�the�vehicle�condition�RESIDING�to�the�vehiclecondition�PARKING�can�be�activated.

If�this�option�is�activated,�then�the�system�will�immediately�change�to�the�vehicle�condition�PARKINGwhen�the�driver's�door�is�opened.�The�elimination�of�the�after-running�period�in�the�residing�vehiclecondition�saves�energy.

5.3.�Power�supply�terminalsControl�units�in�the�vehicle�must�be�supplied�with�power�only�when�they�are�needed.�The�followingterminals�are�used�in�the�G01:

• Terminal�15N• Terminal�30B• Terminal�30F• Terminal�30

Terminal�15N�supplies�control�units�which�are�needed�only�when�driving�and�which�may�be�needed�tosafely�end�a�journey.�After-run�of�5�s�starts�at�the�transition�from�DRIVING�to�RESIDING.

Terminal�30B�is�used�to�supply�control�units�that�are�needed�in�the�stationary�mode�RESIDING�and�forstationary�functions�where�the�customer�is�not�in�the�vehicle.�An�after-run�of�6�minutes�starts�at�thetransition�from�RESIDING�to�PARKING,�and�terminal�30B�is�then�switched�off.

Terminal�30F�is�used�to�supply�control�units�which�must�perform�functions�in�PARKING�condition.Terminal�30F�is�normally�switched�on�in�PARKING�condition,�but�may�be�switched�off�due�to�faults�inthe�vehicle�electrical�system.�The�terminal�is�switched�off�with�an�after-running�period�of�1�min�if�a�faultis�detected.

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Terminal�30�control�units�(e.g.�alarm�system)�are�always�supplied�with�voltage�and�are�also�notswitched�off�in�the�event�of�a�fault.

Terminal�30F Terminal�30B Terminal�15NPARKING,�vehicleelectrical�system�notOK�(fault�in�vehicleelectrical�system)

off off off

PARKING,�vehicleelectrical�system�OK

on off off

Stationary�functions(customer�not�invehicle)

on on off

RESIDING on on offDRIVING on on on

Testing-analysis-diagnosis�(PAD)�mode

The�vehicle�condition�testing-analysis-diagnosis�is�still�present�for�diagnosis.�All�terminals�areswitched�on�in�this�mode.�This�ensures�that�diagnosis�can�be�performed�with�all�control�units.�Thisvehicle�condition�is�displayed�in�the�BMW�diagnosis�system�ISTA.

Activation�of�the�PAD�mode:

• Operation�of�the�start/stop�button�(three�times�within�0.8 s)�+�valid�remote�control�or�valid�IDtransmitter�in�the�vehicle�interior

• By�the�BMW�diagnosis�system�ISTA.

The�PAD�mode�is�exited�by�pressing�the�start/stop�button�or�by�closing�the�diagnosis�with�thediagnosis�system�ISTA.

5.4.�Partial�network�operationToday's�premium�vehicles�contain�up�to�70�control�units�with�well�over�100�microcontrollers�which�arenetworked�with�each�other.�However,�depending�on�the�current�vehicle�condition�or�the�vehicle�userrequirement,�not�all�convenience�and�assistance�systems�may�always�be�needed.

It�is�possible�to�save�energy,�relieve�the�load�on�the�battery�and�also�prolong�the�battery�life�by�targeteddeactivation�and�activation�on�control�units�which�are�not�needed,�so-called�selective�partial�networkoperation.

In�vehicles�with�combustion�engine,�the�electrical�energy�consumption�is�indirectly�linked�to�the�fuelconsumption�via�the�alternator.�As�a�result,�selective�deactivation�of�control�units�that�are�not�currentlyneeded�can�contribute�to�reducing�fuel�consumption�and�thus�also�CO2�emissions.

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5.4.1.�Partial�network�operation�when�drivingIf�functions�are�not�used�or�needed�when�driving,�e.g.:

• Seat�adjustment• Trailer�lighting�(no�trailer�attached)

the�corresponding�control�units�can�be�switched�off.

5.4.2.�Prerequisites�for�partial�network�operationThe�partial�network�primary�in�the�Body�Domain�Controller�calculates�a�partial�network�status�onthe�basis�of�the�current�vehicle�condition�and�the�required�functions.�The�control�units�that�are�notrequired�are�switched�off�by�means�of�the�corresponding�bus�messages.

5.4.3.�Prerequisites�of�control�units�for�partial�network�operationDifferent�transceivers�are�used�in�order�to�realize�partial�network�operation�in�control�units.�Thesetransceivers�are�able�to�evaluate�and�interpret�messages.�This�control�unit�remains�switched�off�aslong�as�any�bus�communication�takes�place�without�a�valid�wake-up�event�for�the�correspondingcontrol�unit�being�present.�If�a�valid�wake-up�event�for�the�corresponding�control�unit�is�sent�on�thebus,�the�transceiver�can�activate�the�voltage�regulator�of�the�microcontroller�and�the�control�unit�startsup.�The�control�unit�is�switched�off�by�deactivation�of�the�voltage�regulator.

5.4.4.�Partial�network�operation�when�the�vehicle�is�stationary�and�the�engineis�switched�offFor�example,�if�only�the�radio�function�is�required�when�the�engine�is�switched�off,�the�bus�systemswhich�are�not�required�are�switched�off.�If�an�operation�is�then�carried�out�with�the�controller,�forexample,�the�buses�are�woken�up�again.�Once�the�operation�has�been�carried�out,�the�bus�systemswhich�are�not�required�are�switched�off�again.�Switching�off�the�bus�systems�which�are�not�requiredalong�with�the�corresponding�control�units�saves�energy.�The�reduced�energy�consumption�means,�forexample,�that�it�is�possible�to�play�the�radio�for�significantly�longer�before�it�is�switched�off�due�to�thebattery�being�too�drained.

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